Educational Wellness Information Only
This platform provides peer-reviewed research summaries and educational content about peptides for wellness and optimization purposes. Nothing on this site is intended as medical advice, diagnosis, or treatment. We do not claim any peptide can diagnose, treat, cure, or prevent any disease. Always consult a licensed healthcare provider before beginning any wellness protocol.
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Follistatin 344 vs IGF-1 LR3
An educational, source-based comparison of Follistatin 344 and IGF-1 LR3 — how each peptide works, what it's researched for, and what to know before going deeper.
Myostatin-binding protein fragment researched for muscle growth.
A naturally occurring glycoprotein that binds and neutralizes myostatin and activin, releasing the natural brake on skeletal muscle growth in preclinical models.
- Muscular dystrophy models
- Skeletal muscle hypertrophy
- Age-related sarcopenia (preclinical)
- • Off-target effects on activin signaling (reproductive, cardiac) are a concern.
- • Not FDA-approved; banned by WADA.
A modified form of insulin-like growth factor-1 with an Arg3 substitution and N-terminal extension that reduces binding to IGFBPs, dramatically extending its half-life and free fraction in circulation.
- Muscle protein synthesis (preclinical)
- Tissue repair signaling
- Cell-culture growth applications
- • Hypoglycemia risk via insulin-receptor cross-activity.
- • Not FDA-approved for human therapeutic use; banned by WADA.
Follistatin 344 vs IGF-1 LR3 — Key differences
- Class: Follistatin 344 is classified as Muscle · Myostatin Inhibition, while IGF-1 LR3 is Growth Factor.
- Primary research focus: Follistatin 344 — muscular dystrophy models; IGF-1 LR3 — muscle protein synthesis (preclinical).
- Tag: Muscle vs Growth · Recovery.